Recently someone suggests me vMail OLM to PST Converter application to transfer OLM file into PST file format. If I used this tool then I know application features like it move OLM into PST, EML, MBOX, MSG file format simply. I also get the trial version to move some items from each folder freely and here does not face any kind of OLM data issues.

Know more info- https://www.vsoftware.org/olm-to-pst-converter.html